baber/WOPTO huggingface dataset:
Patent WO-2021152688-A1 (WO)
Title: Power conversion device
Inventor: FUJIWARA KENJI
IPC: H02M3/155
Filed: 2020-01-28
Abstract: In the present invention, an N-number of parallelly connected DC/DC converters (1-N, N is 3 or more) is provided with: a first converter group that executes PWM switching at a first carrier; and a second converter group that executes PWM switching at a second carrier different in phase from the first carrier. One or more DC/DC converters (1-N) are allocated to each of the converter groups, a plurality of operation modes for setting the number of converters to be operated and the converter group are provided, switching is executed among the operation modes through comparison of the total output of the N-number of DC/DC converters with a preset threshold value, and the ratio of the total output of the first converter group to that of the second converter group is set within a predetermined range.
Patent WO-2020184259-A1 (WO)
Inventor: OGAWARA OSAMU
IPC: H04N21/43
Filed: 2020-03-02
Abstract: [Technical Problem] A problem to be solved is to provide an image display system capable of improving the effect of displaying an image for an advertisement, for example. [Solution to Problem] An image display system includes an image delivery apparatus configured to deliver an image and a terminal apparatus configured to receive an image from the image delivery apparatus. The image delivery apparatus includes at least one processor configured to receive first image data having a transparent area and second image data associated with the first image data for being registered in the image delivery apparatus, and transmit the received first image data and second image data to the terminal apparatus. The terminal apparatus includes at least one processor configured to obtain the first image data and the second image data from the image delivery apparatus, and display, in a screen page, the obtained first image data and second image data in a superimposed manner.
Patent WO-2020195589-A1 (WO)
Inventor: TAKAMATSU TAKASHI
IPC: B60B5/02
Filed: 2020-03-03
Abstract: A multi-layered structure (1) is layered with a metal material (2), a thermoplastic first resin material (3) that is joined to the metal material (2), and a thermoplastic second resin material (4) that is joined to the first resin material (3) and contains carbon.
Patent WO-2021176644-A1 (WO)
Inventor: SASAKI TOMOYUKI
IPC: G11C11/16
Filed: 2020-03-05
Abstract: A magnetic recording array (200) according to the present embodiment comprises a plurality of spin elements (100) and a shared transistor (STr) that is connected to an adjacent first spin element and second spin element. Each of the plurality of spin elements has wiring (20) and a laminate (10) containing a first ferromagnetic layer (1) which is laminated on the wiring. The shared transistor has a first gate (G1), a second gate (G2), a first area (A1), a second area (A2), and a third area (A3). In plan view from the lamination direction of the laminate, the first area is interposed between the first gate and the second gate, the second area is interposed between the first area and the first gate, and the third area is interposed between the first area and the second gate. One of the second area and the third area is connected to the first spin element, and the other is connected to the second spin element.
Patent WO-2020203183-A1 (WO)
Inventor: NAKABAYASHI YUUJI
IPC: G01K13/02
Filed: 2020-03-13
Abstract: The present invention comprises: a channel body (1) having a channel (2) through which a fluid to be measured flows; a pair of ultrasonic transducers disposed in the channel body (1); a substrate (9) fixed to the channel body (1); a flat sensor plate (8) on which a temperature sensor (11) for detecting the temperature of the fluid to be measured is disposed; and an arithmetic unit which calculates the flow rate of the fluid to be measured from the propagation time of ultrasonic waves between the ultrasonic transducers and the temperature detected by the temperature sensor. The sensor plate (8) is configured to protrude from the substrate (9), and to project into the channel cross section of the channel (2) from a sensor hole (10) provided in the channel body (1) when the substrate (9) is fixed to the channel body (1). With this configuration, it is possible to achieve an ultrasonic flowmeter which can significantly reduce the influence of the ambient temperature of the channel (2) and measure the fluid temperature with high accuracy, and has high measurement accuracy.
Patent WO-2021181690-A1 (WO)
Title: Container
Inventor: OYAMA TSUBASA
IPC: B65D75/38
Filed: 2020-03-13
Abstract: A container (100) is constituted by comprising: one or a plurality of sheet materials that include a body-constituting sheet material (21) obtained by laminating a plurality of film layers that include an inner film layer (23) and an outer film layer (22). The body-constituting sheet material (21) has: a first non-bonded section (24a) in which the inner film layer (23) and the outer film layer (22) are non-bonded; a second body seal section (27) in which the inner film layer (23) and the outer film layer (22) are bonded; and a second non-bonded section (24b) in which the inner film layer (23) and the outer film layer (22) are non-bonded. A filling material is sealed in the first non-bonded section (24a) to form a filled section (60). When an isolating seal section (26c), which is a portion that separates the filled section (60) from the second non-bonded section (24b) in a first body seal section (26), is detached, the filling material is allowed to flow from the filled section (60) into the second non-bonded section (24b).
Patent WO-2020196099-A1 (WO)
Inventor: KAMATA TAKATSUGU
IPC: A61B5/308
Filed: 2020-03-17
Abstract: The purpose of the present invention is to enable acquisition of data using less power. This data acquisition apparatus has an integrated circuit and an information processing device. The integrated circuit has: a first terminal to which a switch signal for master/slave switching is input at the start of acquisition of data; an A/D inverter for converting input analogue data to digital data; and an output terminal for outputting the digital data. In response to the switch signal, the integrated circuit is set as a master or slave. The information processing device has: a switching setting unit which, when the integrated circuit is a slave, sets the information processing device as a master, when the integrated circuit is a master, sets the information processing device as a slave, and generates the switch signal; a second terminal which is connected to the first terminal and outputs the switch signal; and an input terminal which is connected to the output terminal and to which the digital data is input. When the integrated circuit is set as a master on the basis of the switch signal input from the information processing device, the integrated circuit outputs the digital data from the output terminal.
Patent WO-2020196882-A1 (WO)
Inventor: ARAMAKI NAOKI
IPC: A61B17/11
Filed: 2020-03-27
Abstract: [Problem] To provide an adhesion-promoting device capable of reducing the risk of suture failure following a procedure such as surgery. [Solution] An adhesion-promoting device 100 is disposed between one portion to be joined and another portion to be joined of a biological organ, and includes: a sheet-like first region 11 for promoting adhesion of biological tissue; a second region 12 that is located inside the first region but away from the first region in a direction intersecting the surface of the first region; and a connection part 13 that connects the first region and the second region.
Patent WO-2020217999-A1 (WO)
Inventor: KONISHI KATSUNORI
IPC: H01L31/0747
Filed: 2020-04-09
Abstract: The present invention provides a method for manufacturing a solar cell in which a decrease in the liftoff performance by a liftoff layer is avoided. The method for manufacturing a solar cell includes: a step for forming, on the reverse surface side of a semiconductor substrate (11), a material film for a first intrinsic semiconductor layer, a material film for a first-conductivity-type semiconductor layer, and a liftoff layer; a step for removing, in a second region (8), the liftoff layer, the material film for the first-conductivity-type semiconductor layer, and a part, with respect to the film thickness direction, of the material film for the first intrinsic semiconductor layer and forming, in a first region (7), the first intrinsic semiconductor layer (23), the first-conductivity-type semiconductor layer (25), and the liftoff layer (40); a step for forming a material film (33Z) for a second intrinsic semiconductor layer and a material film (35Z) for a second-conductivity-type semiconductor layer on the first intrinsic semiconductor layer (23) in the second region (8) and the liftoff layer (40) in the first region (7); and a step for removing the liftoff layer (40), removing the material film (33Z) for the second intrinsic semiconductor layer and the material film (35Z) for the second-conductivity-type semiconductor layer in the first region (7), and forming, in the second region (8), the first intrinsic semiconductor layer (23), the second intrinsic semiconductor layer, and the second-conductivity-type semiconductor layer.
Patent WO-2020218356-A1 (WO)
Title: 耐放射線性無機材料及びその繊維
Inventor: FUKAZAWA HIROSHI
IPC: C03C3/087
Filed: 2020-04-22
Abstract: 【課題】耐放射線性に優れ、かつ溶融紡糸性に優れる無機材料を提供すること。 【解決手段】SiO 2 ，Al 2 O 3 ，CaO，及びFe 2 O 3 を成分として含む無機材料において、その無機材料中の上記成分の酸化物換算での質量百分率が、 i)SiO 2 及びAl 2 O 3 の合計の含有量を４０質量％以上７０質量％以下に、 ii) Al 2 O 3 ／（SiO 2 ＋Al 2 O 3 ）（質量比）を０．１５～０．４０の範囲に、 iii)Fe 2 O 3 の含有量を１６質量％以上２５質量％以下に、 iv)CaOの含有量を５～３０質量％にすることにより、溶融紡糸性に優れ、かつ耐放射線性に優れる無機材料とすることができた。
Patent WO-2021005867-A1 (WO)
Title: Sliding device, and rail manufacturing method
Inventor: TANIGUCHI KOSUKE
IPC: F16C33/66
Filed: 2020-04-24
Abstract: This sliding device for a vehicular seat is provided with, at fixed rail and mobile rail sites in contact with a rolling element, a masking film that is non-conductive or has the same polarity as an electrodeposition coating film.
Patent WO-2020251020-A1 (WO)
Inventor: UMEDA NOBUYOSHI
IPC: A61P37/02
Filed: 2020-06-12
Abstract: The present invention addresses the problem of providing a cell population including mesenchymal cells, capable of forming a cell sheet that can be spontaneously peeled off from a substrate. The present invention relates to a cell population including mesenchymal cells, in which the percentage of CD324 positive cells is 70% or more, and the percentage of CD90 positive mesenchymal cells is 90% or more.
Patent WO-2021065091-A1 (WO)
Title: レンズ系、撮像装置及び撮像システム
Inventor: SHOBAYASHI HIROYUKI
IPC: G03B15/00
Filed: 2020-06-16
Abstract: レンズ系は、物体側から像面側に並んだ複数のレンズ素子と、複数のレンズ素子の間に配置された絞りとを備える。複数のレンズ素子は、互いに交差する第１方向と第２方向との間で非対称な自由曲面を有する複数の自由曲面レンズを含む。絞りよりも像面側に、少なくとも１枚の自由曲面レンズが配置される。絞りよりも物体側に、軸上光線の最大高さにおける第１方向のレンズ厚みＴ１と、軸上光線の最大高さにおける第２方向のレンズ厚みＴ２とが、Ｔ１／Ｔ２＜０．８を満たす少なくとも１枚の自由曲面レンズが配置される。
Patent WO-2021002461-A1 (WO)
Inventor: SHINTAKU ANNA
IPC: A41B9/02
Filed: 2020-07-03
Abstract: The present invention addresses the problem of providing a garment that, when worn, can form a womanlike body line and better suppress a manlike body line. This lower body garment 100 comprises a front piece 101 and a rear piece 103. The front piece 101 of the lower body garment 100 comprises a first accommodation part 11 that is provided at a substantially central upper part. The first accommodation part 11 is configured to accommodate a first swelling member 11a.
Patent WO-2021020292-A1 (WO)
Inventor: OHBATAKE YOUJIROU
IPC: G09G5/36
Filed: 2020-07-22
Abstract: This display system is provided with: an image acquisition unit that acquires a first image of a work site, which is captured by a first camera, and a second image of the work site, which is captured by a second camera; a viewpoint position calculation unit that calculates the viewpoint position of a worker; a brightness adjustment unit that, on the basis of the viewpoint position, adjusts the brightness of the first image and/or the second image; and a display control unit that synthesizes the first image and the second image the brightness of each of which is adjusted, and causes a display device to display the synthesized first image and second image.
Patent WO-2021020524-A1 (WO)
Inventor: FURUTA MASAYA
IPC: A47C7/40
Filed: 2020-07-30
Abstract: Provided is a vehicle seat which makes it possible to easily set the position in the left-right direction of a base cover.　A vehicle seat (100) having a seatback frame (1), a base cover (10) and a wire (20) which spans the interval between vertical frames, wherein: the wire has a bent section (21) which is bent in a U-shape and a connecting section (22) which connects the bent section and a vertical frame (4a) to one another; the bent section has a pair of first sections (23) and a second section (24) which connects the first sections at the bottom ends thereof; and the base cover is provided with a cover main body (15), a left-right wire-securing part (11) which extends to the front from the cover body and holds the connecting section of the wire, a vertical wire-securing part (12) which extends to the front from the cover body and holds the first section of the wire, and has a left-right restricting part (13) which restricts movement in the left-right direction and is provided in a location adjacent to the first section of the bent section, and a lower hook part (14) which extends to the front from the cover body and fastens to the second section near the curving section located at the bottom of the bent section.
Patent WO-2021039717-A1 (WO)
Title: Method for producing freshness-keeping bag
Inventor: WATANABE TORU
IPC: B65D81/26
Filed: 2020-08-24
Abstract: Provided is a method for producing a freshness-keeping bag that can keep the freshness of contents for a long period of time with very little inflow of oxygen from the outside.　The present invention provides a method for producing a freshness-keeping bag that is formed from a film and has a strip-like bonding area in which the two ends of the film are joined and bonded to each other. The bonding area includes a plurality of bonding portions in which the two ends of the film are bonded to each other, and a non-bonding portion that is disposed between the adjacent bonding portions. In the non-bonding portion, the ends of the film are not bonded to each other. The non-bonding portion constitutes a non-linear air passage connecting the internal space of the bag and the outside of the bag. The method comprises the step for forming the bonding portions by ultrasonic welding. In the step for forming the bonding portions, the bonding portions are sequentially formed on the film while a disc-shaped ultrasonic welding anvil is rotated with respect to the film. The anvil has a plurality of projections that are sequentially formed at predetermined intervals on the outer periphery of the anvil so as to agree with the shapes of the bonding portions of the bag.
Patent WO-2021166296-A1 (WO)
Inventor: KONDO DAISUKE
IPC: F24F1/0076
Filed: 2020-09-10
Abstract: 空気調和機の筐体の内部に付着した油を削減し、また油による臭いも低減する。　放電により水を解離してイオンを発生させるイオン発生部５と、吸気口２１１から吸い込んだ空気を吹出口２１２に送る送風機２３と、吸気口２１１から吸い込んだ空気と熱を交換する熱交換器２４と、吹出口２１２から吹き出す空気の方向を調整する風向調整部２５と、送風機２３、熱交換器２４及びイオン発生部５を収容する筐体２１と、制御部６と、を備え、制御部６は、暖房運転停止後に、イオンを筐体２１の内部に充満させるように、送風機２３、風向調整部２５、及びイオン発生部５を制御する。
Patent WO-2021065617-A1 (WO)
Inventor: NAKABAYASHI MASAAKI
IPC: G08G1/16
Filed: 2020-09-23
Abstract: This vehicular display system (4) is provided with: a road surface drawing device (45) which is configured to emit an optical pattern toward a road surface; an HUD (42) which is configured to display HUD information toward a passenger; and a display control unit (43) which is configured to control the road surface drawing device (45) and the HUD (42). The display control unit (43) matches the distance from the passenger to the HUD information and the distance from the passenger to the optical pattern, when both the HUD information and the optical pattern are displayed.
Patent WO-2021075539-A1 (WO)
Inventor: HIRAGA KEIZO
IPC: G11C14/00
Filed: 2020-10-16
Abstract: A non-volatile storage circuit (10) according to an embodiment is provided with: a volatile storage unit (11) which stores information; a non-volatile storage unit (20) to which the information of the volatile storage unit is written by a store operation, and from which information is read out, by a restore operation, to the volatile storage unit (11) via a restore route different from a store route taken at the time of the store operation; a driver unit (12, 15) which receives power supply and performs the store operation; and a switch unit (13, 14, 16, 17) which shuts off the power supply to the driver unit (12, 15) at the time of the restore operation.
Patent WO-2021079912-A1 (WO)
Title: Boron nitride powder and production method therefor, boron carbonitride powder, composite material, and heat dissipating member
Inventor: TAKEDA GO
IPC: C01B21/064
Filed: 2020-10-21
Abstract: One aspect of the present invention provides a boron nitride powder that contains aggregated particles formed through aggregation of primary particles of boron nitride. The cumulative pore volume of the boron nitride powder within a fine pore radius of 0.02-1.2 µm as measured by a mercury porosimeter is 0.65 mL/g or less.
Patent WO-2021085479-A1 (WO)
Inventor: KAMEOKA Ryota
IPC: E02F3/43
Filed: 2020-10-28
Abstract: Provided is construction machinery in which automatic cancellation of movement restrictions following sudden acceleration unintended by an operator or the like is prevented even if the tilt angle for the vehicle body changes. The construction machinery comprises a movable vehicle body 50, 3D sensors (obstacle detection devices) 5, 6, 7, 8 that detect obstacles present around the vehicle body 50, a tilt angle determination device (tilt angle detection device) 9 that detects the tilt angle of the vehicle body 50, and a vehicle body controller (control device) 14 that is equipped with a movement restriction function to execute restriction control for restricting movement of the vehicle body 50 when an obstacle is detected by the 3D sensors (obstacle detection devices) 5, 6, 7, 8. The vehicle body controller (control device) 14 disables the movement restriction function if the restriction control is not executed by the movement restriction function when the tilt angle of the vehicle body 50 exceeds a prescribed threshold value and does not disable the movement restriction function if the restriction control is executed by the movement restriction function when the tilt angle of the vehicle body 50 exceeds the prescribed threshold value.
Patent WO-2021137276-A1 (WO)
Inventor: HASHIMOTO NOBUAKI
IPC: B26D5/02
Filed: 2020-11-16
Abstract: 本発明の穿孔装置１００は、透視又は撮像される現実の像を目視可能なディスプレイ１と、穿孔用工具３と、穿孔目印用治具４と、撮像手段７（穿孔用工具３等の外観情報を取得する外観情報取得手段）と、穿孔方向延長線３１及び穿孔終点４１を含む仮想３次元画像１２を作成し現実の像に反映させてディスプレイ１に表示させる制御手段２と、を備える。　本発明の穿孔装置１００によれば、従来必要であったＣＴ撮像、モックアップ作成、シミュレーション等の大掛かりな設備を必要とせずに的確な穿孔をすることが可能となる。
Patent WO-2022113173-A1 (WO)
Inventor: PETLADWALA MURTUZA
IPC: G08G1/00
Filed: 2020-11-24
Abstract: Un objet de la présente divulgation est de fournir un appareil de détection d'événement de la circulation, un système de détection d'événement de la circulation, un procédé et un support lisible par ordinateur non transitoire capables de détecter correctement des événements de la circulation. Un appareil de détection d'événement de la circulation comprend une unité d'estimation de trajectoire (11) configurée pour estimer une trajectoire d'un objet en mouvement en fonction d'un signal d'oscillation, à l'aide d'un réseau neuronal profond, lorsque que le signal d'oscillation est induit par la circulation de l'objet en mouvement ; une unité d'extraction d'estampille temporelle (12) configurée pour extraire une estampille temporelle de l'objet en mouvement, en fonction de la trajectoire de l'objet en mouvement ; et une unité d'extraction d'événement (13) configurée pour extraire une partie du signal d'oscillation correspondant à l'estampille temporelle de l'objet en mouvement.
Patent WO-2021124863-A1 (WO)
Title: 旋盤、及び、そのガイド部材取り付け方法
Inventor: ASABA Yohei
IPC: B23B13/12
Filed: 2020-12-01
Abstract: ガイドブッシュ方式からノンガイドブッシュ方式に切り替える作業を軽減させることが可能な旋盤、及び、そのガイド部材取り付け方法を提供する。ワークＷ１を把持する主軸（１２）、主軸台（１０）、駆動部（２０）、支持台（３０）、ガイド部材（４０）、及び、位置決め部材（５０）を備える。主軸台（１０）は、主軸中心線ＡＸ１を中心として主軸（１２）の外側に配置されたクイル（１１）を有し、主軸（１２）を回転可能に支持する。駆動部（２０）は、主軸台（１０）を主軸中心線方向Ｄ１へ移動させる。支持台（３０）には、主軸（１２）の前方においてワークＷ１を摺動可能に支持するガイドブッシュ（３２）が着脱可能に設けられる。ガイド部材（４０）は、ガイドブッシュ（３２）が取り外された支持台（３０）に取り付けられ、クイル（１１）を主軸中心線方向Ｄ１へ摺動可能に支持する。位置決め部材（５０）は、支持台（３０）に取り付けられ、ガイド部材（４０）の中心線ＡＸ２を主軸中心線ＡＸ１に合わせる。
Patent WO-2021112153-A1 (WO)
Title: Torque transfer joint and electric motor with worm reduction gear
Inventor: ISHII TORU
IPC: H02K7/116
Filed: 2020-12-02
Abstract: A torque transfer joint comprises: a first elastic body having a plurality of first elastic pieces that are pinched, respectively, in the circumferential direction between a first projecting part and a coupling; and a second elastic body having a plurality of second elastic pieces that are pinched, respectively, in the circumferential direction between a second projecting part and the coupling.
Patent WO-2021131638-A1 (WO)
Title: サービス管理装置、パワーコンディショニングシステム、分散電源システム、電力制御システム、サービス管理方法および記録媒体
Inventor: KUDO KOJI
IPC: H02J3/32
Filed: 2020-12-07
Abstract: サービス管理装置が、複数の電源機器のうち何れか１つ以上を用いて行われるサービスにおける入出力電力の内訳を、電源機器毎に区分して算出する区分処理手段と、前記サービスの実施結果の入出力電力量の内訳を、前記区分処理手段による区分毎に記録するサービス記録手段と、を備える。
Patent WO-2021132227-A1 (WO)
Inventor: YAMAMOTO KENJI
IPC: H04N7/18
Filed: 2020-12-22
Abstract: This information processing device is provided with an input interface, a processor, and an output interface. The input interface acquires observation data obtained from an observed space. The processor detects a detection target contained in the observation data. The processor performs a mapping transformation of the coordinates of the detected detection target onto coordinates of the detection target in a virtual space, tracks the position and speed of a mass point representing the detection target in the virtual space, and performs a mapping transformation of the coordinates of the tracked mass point in the virtual space onto coordinates in a display space. The processor successively observes the size of the detection target in the display space, and estimates the size of the detection target on the basis of the observed value of the size of a subject image at the current time, and an estimated value of the past size of the subject image. The output interface outputs output information based on the coordinates of the mass point subjected to the mapping transformation onto the display space, and the estimated size of the detection target.
Patent WO-2022137366-A1 (WO)
Inventor: SUGIMOTO TAKAAKI
IPC: F24F120/12
Filed: 2020-12-22
Abstract: 空気調和機（１０）は、室内の表面温度の温度分布の熱画像の情報である熱画像情報を取得する熱画像情報取得部（２２）を備える。端末装置（１４）は、空気調和制御において室内に居るユーザに向けた送風を行う風向である対象風向を予め決められた周期で決定して空気調和制御部（２４）に送信する端末制御部（３６）と、を備える。端末制御部（３６）は、熱画像情報に基づいて、熱画像と熱画像において検知される検知人体を表示部（３２）に予め決められた周期で表示し、表示部に表示された検知人体から選択された検知人体が熱画像において存在するエリアに向かう風向を対象風向として決定する。空気調和制御部（２４）は、対象風向に基づいて風向を制御する。
Patent WO-2021132651-A1 (WO)
Title: 有機エレクトロルミネッセンス素子及び電子機器
Inventor: LEE YONGGUK
IPC: H01L51/50
Filed: 2020-12-25
Abstract: 陰極と、陽極と、前記陰極と前記陽極との間に配置された少なくとも１つの発光層と、を有し、前記発光層は、第１のホスト材料と、第２のホスト材料と、ドーパント材料と、を含み、前記第１のホスト材料は、下記式（１）で表される化合物であり、前記第２のホスト材料は、下記式（２）で表される化合物であり、前記式（１）で表される化合物及び式（２）で表される化合物からなる群から選択される１以上は、少なくとも１つの重水素原子を有する有機エレクトロルミネッセンス素子。
Patent JP-WO2019159587-A1 (JP)
Title: リスク評価システム及びリスク評価方法
IPC: G06Q50/22
Filed: 2019-01-17
Abstract: 重複しない複数の領域を含む設備の画像を異なる時間に撮影して、前記撮影された複数の画像を出力する撮影部（３００）と、前記複数の画像に基づいて前記複数の領域のそれぞれへの生体の接触回数を検出し、前記接触回数に基づいて前記複数の領域それぞれにおける接触感染リスクの評価情報を決定し、前記評価情報を出力する制御部（１０２）と、を備えるリスク評価システム。
Patent JP-WO2019176452-A1 (JP)
Title: ドリル
IPC: B23B51/00
Filed: 2019-02-18
Abstract: 【課題】ドリルによる被削材の切削の際、板状の被削材の背面側へのバリの生成を抑制する機能と切屑自体の成長を抑制する機能を併せ持たせる。 【解決手段】ドリル本体の軸方向先端の先端面３０に回転方向前方側を向いて形成された複数本の切れ刃４と、各切れ刃４の回転方向後方側に位置する３番面５の回転方向後方側に形成された切屑排出溝６と、ドリル本体の回転軸Ｏ上を通るチゼルエッジ４ｂを挟んだ両側の２番面４ａ、４ａの回転軸Ｏ寄りの区間と３番面５との間に形成されたシンニング面７を持ち、シンニング面７を回転方向前方側の２番面４ａ側から回転方向後方側の切屑排出溝６側へかけて１段目シンニング面７１と１段目シンニング面７１より深い２段目シンニング面７２とに区分する。 【選択図】図１